10 μm High-resolution spectrum of trans-acrolein: Rotational analysis of the ν11, ν16, ν14 and ν16 + ν18 − ν18 bands

► Analysis of high-resolution Fourier transform spectra of trans-acrolein, H2CC(H)-C(H)O, in the 10 μm region. ► Vibrational bands analyzed include ν11, ν16 and ν14 centered at 911.3, 958.7 and 992.7 cm−1 and the ν16 + ν18 − ν18 hot band centred at 957.6 cm−1. ► Term values and rotational constants have been determined for each state from isolated fits and a combined 3-state fit. ► Transition dipole moments calculated for each fundamental using the ab initio B3LYP method and 6-311++G∗∗ basis.